[FFmpeg-devel] [PATCH] Include field_mode information in NUT stream info

[Anders Rein <anders@onemimir.com>]

This will make it possible to transmit raw video over NUT without losing
the field order information.
---
 libavformat/nutdec.c | 4 ++++
 libavformat/nutenc.c | 3 +++
 2 files changed, 7 insertions(+)

diff --git a/libavformat/nutdec.c b/libavformat/nutdec.c
index 34b7e3cb9a..07eff23134 100644
--- a/libavformat/nutdec.c
+++ b/libavformat/nutdec.c
@@ -607,6 +607,10 @@ static int decode_info_header(NUTContext *nut)
                 continue;
             }
 
+            if (stream_id_plus1 && !strcmp(name, "field_order")) {
+              sscanf(str_value, "%d", &st->codecpar->field_order);
+            }
+
             if (metadata && av_strcasecmp(name, "Uses") &&
                 av_strcasecmp(name, "Depends") && av_strcasecmp(name, "Replaces")) {
                 if (event_flags)
diff --git a/libavformat/nutenc.c b/libavformat/nutenc.c
index 55efb114c3..0853fecf5c 100644
--- a/libavformat/nutenc.c
+++ b/libavformat/nutenc.c
@@ -566,6 +566,9 @@ static int write_streaminfo(NUTContext *nut, AVIOContext *bc, int stream_id) {
         else
             snprintf(buf, sizeof(buf), "%d/%d", st->avg_frame_rate.num, st->avg_frame_rate.den);
         count += add_info(dyn_bc, "r_frame_rate", buf);
+
+        snprintf(buf, sizeof(buf), "%d", st->codecpar->field_order);
+        count += add_info(dyn_bc, "field_order", buf);
     }
     dyn_size = avio_close_dyn_buf(dyn_bc, &dyn_buf);
 
-- 
2.48.1


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